Study On The Braking Energy Recovery System Of The Precursor Pure Electric Vehicle

As the global oil consumption increases, the energy crisis becomes more and more serious, and the problem of environmental pollution has become more and more serious. Because of its no emissions, low noise, less pollution and so on, the electric vehicle has become an important way to solve the current problems of resources and environment. At present, the main factors restricting the development of electric vehicles are short driving range, short battery life and the high cost of use. In the near future, braking energy recovery technology is the most direct and effective way to solve this problem. Use the braking energy recovery system to recover the energy of the electric vehicle during the braking process and store it into the battery, thereby increasing the mileage to further reduce the cost of the battery. Study of braking energy recovery system with high energy recovery rate is the most effective method to increase the driving range.On the basis of research on the structure and principle of the braking energy recovery system the working status of permanent magnet DC motor and the principle of power generation, studied the effect of braking force distribution on the energy recovery rate, and it is clear that the distribution of regenerative braking system will directly affect the energy recovery rate, and established the braking force distribution strategy. In order to ensure the consistency of the traditional automobile mechanical friction braking system and recovery braking system to improve the stability and comfort of the braking process,on the basis of the establishment of maximum energy recovery braking force distribution policy, the motor control method is further studied, and a double PID closed-loop feedback control method is proposed to control the braking strength and the braking torque of the motor. By reestablishing the braking force distribution control strategy in the ADVISOR advanced simulation software, the new model is simulated by ADVISOR. The simulation results show that the braking force distribution strategy can effectively improve the energy recovery rate, and increase the driving range of the electric vehicle.